FreeBSD 9.0-BETA 2, camcontrol readcap, no passthrough device found

Craig Rodrigues rodrigc at
Tue Sep 27 21:59:30 UTC 2011

On Tue, Sep 27, 2011 at 6:45 AM, Andriy Gapon <avg at> wrote:
> on 27/09/2011 02:02 Craig Rodrigues said the following:
>> Is "camcontrol readcap" supposed to work for an ATA disk?
> Or, rephrased - is a SCSI command supposed to work for an ATA disk.
> I am sure that you know the answer.
> P.S. camcontrol, of course, can be extended to support the corresponding ATA command.


According to this document:

"SCSI / ATA Translation Standard"

The SCSI READ CAPACITY command should map to the ATA IDENTIFY DEVICE command.
I am not familiar with the ATA_CAM code, so don't know if we do this properly
for ATA_CAM.  Maybe Alexander Motin can chime in.
Craig Rodrigues
rodrigc at

More information about the freebsd-current mailing list